Improvement in stoves



AV i* A.. LYND.

ST'OVE.

Patemted June 12, 1877.

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'UNITED STATES TENT FFICE.

ANDRE \V LYND, OF ALBANY, NEW YORK, ASSIGNOR OF ONE-HALF HIS RIGHT TOJOHN E.

MILLER, OF SAME PLACE.

IMPROVEMENT IN STOVES.

Specification forming part of Letters Patent No. 191,507,

dated June l2, 1877; application iiled March 7 1877.

To all ahom it may concern Y Beit known that I, ANDREW LYND, of' thecity and county of Albany, in the State of New York, have invented a newand useful Improvement in Stoves, which improvement is fully set forthin the following specification and accompanying drawings, in which-Figure 1 is a sectional elevation of a heating-stove, taken at line No.1 in Fig. 3, illustrating the improvement in this invention. Fig. 2 is asectional elevation, talren in the transverse. Fig. 3 is a horizontalsectional view, taken at lines'No. l in Figs. l and 2; and Fig. 4 is amodification of this improvement, illustrating the same applied to acook stove or range.

The object of myinvention is to produce, with the combustion-chamber ofa stove, a series of heating-chambers, by which air may be 'graduallyheated to a high temperature before entering into thecombustion-chamber, and be admitted, when heated, in minute streams orjets to mingle with the hot gases evolved from the burning fuel, so thatthe hot Vgases may not be in the least reduced in their temperature,while at the same time a suiicient quantity of oxygen from the air,heated au equal temperature, may unite with the said tot gases, andproduce perfect combustion of fthe same without being cooled and formingsmoke.

In the drawings, A represents the fire-pot. B is the combustion-chamber,into which the inflammable gases evolved from the fuel in the fire-potrise and are intended to be consumed. C is a flue, leading from thecombustion-chainber to the exit D, eitherin adirect manner or in acircuitous direction, as is common in'revertible flue-stoves, such asisfoundin base-heatin g stoves, orcooking stoves and ranges. Placed at thebase ofthe combustion-chamber B, and at or above the top margin edge ofthe lire-pot, is the air-heating chamber E, composed of a series of twoor more compartments, a, each separated from the other by a perforatedwall, c, which walls may be made of perforated metal or woven wires. Theouter wall of the outer compartment is made imperforate or closed, orsolid in its outer or upper side b, so that no air entering the saidouter compartment may escape into the room. Air is admitted into thesaid outer compartment through openings e c made in the lower side ofthe said compartment. The inner wall, or the wall c', separating theheating-chamber from the combustion-chamber, is made of perforated metalor woven wire similar to the dividing-walls c c.

Inheating-stoves I prefer to place the said heating-chamber below thebase or lower margin edge of the mica windows, and employ the usualdivision-ring F to form a portion of the .outer imperl'orate wall, whilethe openings or ports c e for the admission of air may be made in thatportion of the wall ofthe stove directly below the said ring. Yet it isevident that any portion of the wall of the combustionchamber, or aplate adjunctive to the same, may be employed to form such animperforate wall for the said heating-chamber for securing the sameresults. I also prefer to extend the heatingchamber in a continuousmanner around the combustion-chamber from one side of the flue C to theopposite side, as shown. Yet it is evident that a continuity of the saidchamber is not absolutely necessary, as itmay be divided, or made toconsist of several smaller chambers, capable of aggregating about anequal amount of heating capacity.

The manner in which the improvement in this invention operates is asfollows: While the fuel is being burned in the lire-pot, and theinilammable gases are being evolved from the top surface ot' the saidburning fuel into the combustionchamber, i'resh air, having its fullnatural amount of oxygen, may pass through the ports e c into the outercompartment of the heating-chamber E, where the said air will becomesomewhat heated, after which it will pass into the next adjoiningcompartment through the minute and numerous openings in theseparatingwall c, into which compartment the air will be yet more highlyheated to escape intothe combustion-chamber, or into a thirdcompartment, and thence into said combustion-chamber, to mingle with theinflammable gases in the same, and be drawn with them toward the lue O,as shown by arrows, over the top surface ofthe burning fuel in thelire-pot, when the hot gases and the oxygen of the hi ghly-heated airmay unite and cause a complete combustion of said hot gases withoutproducing smoke or soot, as the said hot gases will not be liable to bereduced or cooled in their temperature before entering the ue C by thesupply of air being introduced.

I am aware that air-chambers have been employed with re-pots, and weremade to surround the same in whole or part, and were provided with smallopenings, through which air might escape from such air-chambers into thetire-pot. Such chambers are not claimed by me, and form no part of myinvention.

In my invention the inner wall of the airchamber is at a distance fromtheincandescent coals in the ire-pot, so that no excessive expansion ofthe same greater than the outer walls can be had, while in the oldarrangement and employment of air-chambers the inner walls, being formedby the wall of the firepot itself, would become expanded to such adegree greater than the outer walls as to cause them to crack, part, orbreak. In my invention this, in no case, can happen, while at the sametime it may be readily seen that by my improvements the heated air isonly brought in contact with the gases after they have fully separatedfrom the fuel, while in the employment of air surrounding the lire-potand made with it, the air escaping from such chambers acts on the gaseswhile they are being evolved from the fuel, and, therefore, onlysupplement the grate for substantially the same operation ofcontributing to the combustion of the fuel.

Having described my invention, what I claim, and desire to secure byLetters Patent, 1s

The combination, with the combustion-chamber B, in which the disengagedgases burn above the fuel, of the air-heating chamber E, situated abovethe plane of the top edge of the tire-pot and concentrically with thesame, and composed of two or more compartments, each separated from theother by finely-perforated walls, and from the combustion-chamber by afinely-perforated wall, and the air ducts or ports c e leading to thefirst compartment of the series from without, substantially as and forthe purpose set forth.

ANDREW LYN D.

Witnesses COLE T. LYND, WILLIAM F. SELKIRK.

